表面带凸起的圆柱形建筑风荷载数值模拟研究
|
摘要
黄骅港VTS雷达塔属于钢筋混凝土高耸结构,外部18根框架柱呈辐射状布置。以VTS雷达塔为背景,运用计算流体力学(CFD)方法对雷达塔结构及几个圆柱形结构的风荷载进行模拟,得到了结构表面不同凸起情况下的风场和风压分布规律。研究发现结构表面凸起的出现会直接影响风压系数分布曲线的平台区及结构尾流,负风压最大值会因为建筑物表面的凸起而大幅减小;风压系数分布曲线的平台区的宽度、正风压最大值与结构背风面尾流的状态、表面凸起高度等因素之间无明显关联。
The VTS radar tower in Huanghua Port is a reinforced concrete high-rise structure. The 18 frame columns were arranged radially. The computational fluid dynamics(CFD) method was used to simulate the wind load on cylindrical buildings with ridges, and the distribution of wind field was obtained based on the VTS radar tower. Results show that the appearance of convex surfaces impacts the platform area of wind pressure coefficient curves and leeward wakes of wind field directly. The maximum negative pressure is greatly reduced because of the convex surfaces of the building. The platform area width of pressure distribution curves and the maximum positive pressure are not obviously associated with state of the leeward wake of the structure and the height of convex surfaces.
The VTS radar tower in Huanghua Port is a reinforced concrete high-rise structure. The 18 frame columns were arranged radially. The computational fluid dynamics(CFD) method was used to simulate the wind load on cylindrical buildings with ridges, and the distribution of wind field was obtained based on the VTS radar tower. Results show that the appearance of convex surfaces impacts the platform area of wind pressure coefficient curves and leeward wakes of wind field directly. The maximum negative pressure is greatly reduced because of the convex surfaces of the building. The platform area width of pressure distribution curves and the maximum positive pressure are not obviously associated with state of the leeward wake of the structure and the height of convex surfaces.
引文
[1] MASATO ABé,FUJINO Y.Dynamic characterization of multiple tuned mass dampers and some design formulas[J].Earthquake Engineering & Structural Dynamics,1994,23(8):813-835.
[2] 李会知,樊友景,吴义章,等.不同粗糙表面的圆柱风压分布试验研究[J].工程力学,2002,19(2):129-132.
[3] 杜远征.三维圆柱绕流及涡激振动的数值模拟[D].天津:天津大学,2011.
[4] 袁洪升,闫发林,高洪俊,等.基于CFD方法的大跨度结构体型系数计算[J].四川建筑科学研究,2014,40(2):27-30.
[5] 马骏,周岱,李华锋,等.大跨度空间结构抗风分析的数值风洞方法[J].工程力学,2007,24(7):77-85.
[6] 顾明,杨伟,傅钦华,等.上海铁路南站屋盖结构平均风荷载的数值模拟[J].同济大学学报,2004,32(3):141-146.
[7] 杨声虎.唐代古建筑风荷载体型系数的数值风洞模拟计算[D].西安:长安大学,2013.
[8] 袁行飞,吕晓东.兆瓦级太阳能热气流发电站风荷载的数值模拟[J].浙江大学学报(工学版),2011,41(1),99-105.
[9] BAETKE F,WERNER H,WENGLE H.Numerical simulation of turbulent flow over surface-mounted obstacles with sharp edges and corners[J].Journal of Wind Engineering & Industrial Aerodynamics,1990(35):129-147.
[10] 王敬烨,张海军,吴耀华.大跨度屋盖表面风荷载稳态数值模拟建议[J].建筑结构,2013,43(S1):972-976.
[11] 于敬海,韩凤清,李路川.大悬挑钢结构风洞试验与风荷载数值模拟[J].天津大学学报,2016,49(S1):21-27.
[12] Architectural Institute of Japan.AIJ recommendations for loads on buildings[R].Tokyo:Architectural Institute of Japan,2004.
[13] 刘若斐,沈国辉,孙炳楠.大型冷却塔风荷载的数值模拟研究[J].工程力学,2006,23(S1):177-183.
[2] 李会知,樊友景,吴义章,等.不同粗糙表面的圆柱风压分布试验研究[J].工程力学,2002,19(2):129-132.
[3] 杜远征.三维圆柱绕流及涡激振动的数值模拟[D].天津:天津大学,2011.
[4] 袁洪升,闫发林,高洪俊,等.基于CFD方法的大跨度结构体型系数计算[J].四川建筑科学研究,2014,40(2):27-30.
[5] 马骏,周岱,李华锋,等.大跨度空间结构抗风分析的数值风洞方法[J].工程力学,2007,24(7):77-85.
[6] 顾明,杨伟,傅钦华,等.上海铁路南站屋盖结构平均风荷载的数值模拟[J].同济大学学报,2004,32(3):141-146.
[7] 杨声虎.唐代古建筑风荷载体型系数的数值风洞模拟计算[D].西安:长安大学,2013.
[8] 袁行飞,吕晓东.兆瓦级太阳能热气流发电站风荷载的数值模拟[J].浙江大学学报(工学版),2011,41(1),99-105.
[9] BAETKE F,WERNER H,WENGLE H.Numerical simulation of turbulent flow over surface-mounted obstacles with sharp edges and corners[J].Journal of Wind Engineering & Industrial Aerodynamics,1990(35):129-147.
[10] 王敬烨,张海军,吴耀华.大跨度屋盖表面风荷载稳态数值模拟建议[J].建筑结构,2013,43(S1):972-976.
[11] 于敬海,韩凤清,李路川.大悬挑钢结构风洞试验与风荷载数值模拟[J].天津大学学报,2016,49(S1):21-27.
[12] Architectural Institute of Japan.AIJ recommendations for loads on buildings[R].Tokyo:Architectural Institute of Japan,2004.
[13] 刘若斐,沈国辉,孙炳楠.大型冷却塔风荷载的数值模拟研究[J].工程力学,2006,23(S1):177-183.